From Taylor:
Since the guitar pick as we know it was introduced in 1922, players have been choosing their picks almost entirely on function and feel. Taylor has rethought every aspect of pick design for these DarkTone Series guitar picks, offering players a wider range of musical colors with new materials that emphasize different parts of the frequency range. This sample pack features one pick from each DarkTone family, with varying sizes and materials so that you can experiment with the array of sonic textures that your guitar can produce. Try these tone-enhancing picks and hear what you've been missing. Model #2600 - Taylor Premium Ivoroid 351 Pick - 1.21mm - Taylor Premium Ivoroid 346 Pick - 1.21mm - Taylor Premium 351 Thermex Ultra Pick, Blue Swirl - 1.5mm - Taylor Premium 351 Thermex Ultra Pick, Ruby Swirl - 1.25mm - Taylor Premium 351 Thermex Ultra Pick, Abalone - 1.5mm - Taylor Premium 351 Thermex Ultra Pick, Black Onyx - 1.25mm - Taylor Premium 351 Thermex Pro Pick, Tortoise Shell, 1.50mm - Taylor Premium 351 Taylex Pick - 1.25mm - Taylor Premium 651 Taylex Pick - 1.25mm